<template>
  <div>
    <!-- 导航栏 -->
    <van-nav-bar class="page-nav-bar" title="登录">
      <van-icon
        class="close-btn"
        slot="left"
        name="cross"
        @click="$router.back()"
      />
    </van-nav-bar>
    <!-- 登陆表单区域 -->
    <van-form ref="loginForm" @submit="onSubmit">
      <van-field
        name="mobile"
        v-model="user.mobile"
        placeholder="请输入手机号"
        :rules="userFormRules.mobile"
        type="number"
        maxlength="11"
      >
        <i slot="left-icon" class="toutiao toutiao-shouji"></i>
      </van-field>
      <van-field
        v-model="user.code"
        name="code"
        placeholder="请输入验证码"
        :rules="userFormRules.code"
        type="number"
        maxlength="6"
      >
        <i slot="left-icon" class="toutiao toutiao-yanzhengma"></i>
        <template #button>
          <van-count-down
            v-if="isCountDownShow"
            :time="1000 * 60"
            format="ss s"
            @finish="isCountDownShow = false"
          />
          <van-button
            v-else
            class="send-sms-btn"
            round
            size="small"
            type="default"
            @click="onSendSms"
            native-type="button"
            >发送验证码</van-button
          >
        </template>
      </van-field>
      <div class="login-btn-wrap">
        <van-button class="login-btn" block type="info" native-type="submit"
          >登录</van-button
        >
      </div>
    </van-form>
  </div>
</template>

<script>
import { loginAPI, sendSmsAPI } from '@/api'
export default {
  data () {
    return {
      // 登陆表单提交信息
      user: {
        mobile: '', // 手机号
        code: '' // 验证码
      },
      // 登陆表单验证规则
      userFormRules: {
        mobile: [
          {
            required: true,
            message: '手机号不能为空'
          },
          {
            parent: /1[3][5][7][8]\d{9}/,
            message: '手机号格式错误'
          }
        ],
        code: [
          {
            required: true,
            message: '验证码不能为空'
          },
          {
            parent: /^\d{6}$/,
            message: '验证码格式错误'
          }
        ]
      },
      // 控制发送验证码倒计时的显示与隐藏
      isCountDownShow: false
    }
  },
  methods: {
    // 表单的提交事件
    async onSubmit (values) {
      // 1.获取表单数据
      const user = this.user
      // 2.表单验证

      // 在组件中必须通过this.$toast来调用Toast组件
      this.$toast.loading({
        message: '登陆中...',
        forbidClick: true, // 禁用背景点击
        duration: 0 // 持续时间，默认是2000，如果为0则持续展示
      })
      // 3.提交表单请求登录
      try {
        const { data: res } = await loginAPI(user)
        this.$store.commit('setUser', res.data)
        this.$toast.success('登陆成功！')
        this.$router.push('/')
      } catch (err) {
        if (err.response.status === 400) {
          this.$toast.fail('手机号或验证码错误')
        } else {
          this.$toast.fail('登陆失败,请稍后重试', err)
        }
      }
      // 4.根据请求响应结果处理后续操作
      console.log('submit', values)
    },
    // 发送验证码事件处理函数
    async onSendSms () {
      // 1.校验手机号
      try {
        await this.$refs.loginForm.validate('mobile')
        console.log('验证通过')
      } catch (err) {
        return console.log('验证失败', err)
      }
      // 2.验证通过,显示倒计时
      this.isCountDownShow = true
      // 3.请求发送验证码
      try {
        await sendSmsAPI(this.user.mobile)
        this.$toast('发送成功')
      } catch (err) {
        // 发送失败关闭倒计时
        this.isCountDownShow = false
        if (err.response.status === 429) {
          this.$toast('发送太频繁了,请稍后重试')
        } else {
          this.$toast('发送失败,请稍后重试')
        }
      }
    }
  }
}
</script>

<style lang="less" scoped>
.toutiao {
  font-size: 37px;
}
.send-sms-btn {
  background-color: #ededed;
  width: 156px;
  height: 46px;
  line-height: 46px;
  font-size: 22px;
  color: #666;
  // .van-button__text{
  //   width: 100%;
  //   height: 100%;
  // }
}
.login-btn-wrap {
  padding: 53px 33px;
  .login-btn {
    background-color: #6db4fb;
    border: none;
  }
}
</style>
